Boiler



2 Sheets-Sheet l IINVENTOR y Jf/gZ/Z A TORNEY J. J. RATHGEB, .JR

BOILER Filed Nov.

May 19, 1931.

May 19, 1931- J. J. RATHGEB, JR 1,806,178

BOILER.

Filed Nov. l. 1928 2 Shee'oS-Shee'fl 2 INVENTOR ATTORNQY Patented May19', 193i PATENT OFFICE JOSEPH J'. BATHGEB, JB., 0F NEW YORK, N. Y.

BOILER Application led November 1, 1928. Serial No. 316,376.

absorbing chamber with a minimum supply of fuel.

A further object of the invention is the production of a boiler of thisconstruction provided with a central air distributor therein to permitan air draft to the center of the fuel A further object of the inventionis the production of a boiler provided with a combustion chamberintermediate the side walls of the water circulating chamber whereby theheat from the fire bed will be directed to said side walls to heat thewater at a low level and cause a better circulation of the water in theboiler.

` Still a further object of the invention is the production of a boilerhaving means acting to dry the fuel, and to deflect the heat in theproper direction and also acting as a gravity feed for the fuel to there bed.

Still a further object of the invention is the provision of novel meansabove the fire bed acting as an air outlet for facilitating thecombustion of the coal gases.

Other objects and advantages of. the invention will appearfrom theaccompanying description, the invention consisting in the novel boilerand parts thereof hereinafter more particularly described and thenspecified in the claims.

In the accompanying drawings illustrating a practical embodiment of theinvention:

Fig. 1 is a section taken through the boiler, the upper part thereofbeing shown in elevation.

Fig. 2 is a. horizontal section ontheline 2-2 of Fig. 1.

Fig. 3 is a horizontal section on the line 3-3 of Fig. 1.

Fig. 4 is a horizontal section on the line 4--4 of Fig. 1. y

' Fig. 5 is a perspective view of the top portion of two of the upwardlyextending fire pot sections.

Fig. 6 is a perspective view of a portion of the supporting ring.

Referring in detail to the several figures of the drawings:

The base 1 of the boiler forms the ash pit 2, the base being formed witha flanged extension 3 on` which the body 4 of the boiler 1s supported.The body 4 is provided with an inner heat-absorbing wall 5 of chamber 6,shown as a water-circulating chamber. The upper part of the body, shownin elevation 1n F1g. 1, is of any conventional type and forms no part ofmy invention. A hollow supporting ring 7 is bolted or otherwise securedto the flanged extension 3 and is supplled with pairs of openings 8equidistantly spaced apart as shown in Fig. 4.

The specific form of lower grate bars or members per se forms no part ofthe present lnvention but in the specific embodiment of the inventionshown there are a plurality of rotatable gratebars or members 9 suitablyspaced and formed .with openings therebetween as shown in Fig. 4. Thegrate bars are lrotatably supported on the shafts 10 which may bejournalled in suitable bearings (not shown) in the front and rear wallsof the base 1. The central grate bar or member which is designated 11 isnot rotatable but is stationary.

I provide a plurality of upwardly and inwardly extending curved units 12forming the fire pot, each unit being provided with slots 13 thereinwhich are inclined upwardly and outwardly towards the wall 5 of theheatabsorbing chamber 6. Each of these units is provided with aplurality of vertically arranged langes or partition walls 14 extendingoutwardly to the wall 5 to form a plurality of combustion chambers 15;The walls 14 are provided at intervals with openings 16 extendingtransversely therethrough whereby communication may be had from onechamber to another.

The terminal flanges 14 of each unit are recessed at the upper edges asshown at 17 so that when the units are assembled together they may bedetachably held together by clips 18 entering said recesses to form ineffeet a continuous cone-shaped fire pot. At their lower ends the unitsare provided with horizontal flanges 19 carrying pins 20 entering theopenings 8 in the supporting ring 7 which supports the iire box justdescribed. A central air distributor 21 is mounted in the centralportion of the fire box, the air distributor comprising a pipe the lowerend of which is bolted or otherwise secured to the stationary grate bar11. Said distributor is provided around its periphery with severalseries of inclined slots 22. The distributor terminates at its upper endin a hollow head 23 diamond-shaped in cross-section and mounted on saidhead and communicating therewith is a central air outlet 24 having aseries of openings 25 in the upper part thereof. When the fire pot,formed by the units 12, is supplied with fuel 26 the air distributor 21is normally surrounded by the fuel which extends above the head 23 butthe air outlet- 24 extends upwardly above the fuel. lVhen the boiler isin operation the draft comes up through the ashpit past the lower gratebars 9 as in the conventional type of boiler and the flame, coal gases,etc., are directed against the inner wall 5 of the water circulatingchamber 6 and heat the water therein. vThese {ia-mes, gases, etc., iirstpass through the openings 13 in the tire pot wall formed by the units 12and pass through the combustion chambers 15 and upper portionof theboiler to the stack. The smoke and ignited gases can pass freely fromone chamber 15 to the other through the openings 16 provided for thatpurpose thus distributing the. smoke, gases, etc., through the variouschambers and causing uniform heating of the same but without destroyingthe beneicial effects of the separate chambers.

The walls of the iire pot are inclined upwardly and inwardly to providea larger vo ume in the upper portions of the combustion chambers toaccommodate any expansion of the ignited gases which may take place asthey rise. The air distributor 21 is provided with slots 22 sothat thecentral portion of the fuel bed will receive an adequate supply ofcombustion promoting air. The lower surfaces of the head 23 are inclinedupwardly and outwardly to direct the heat towards the wall of thewater-circulating chamber 6 while the upper surfaces of said airdistributor 23 act to distribute the fresh coal thrown in the furnacedown on the re bed by the action of gravity. The head as a. whole actsto dry any fresh fuel which may be fed to the fire bed.

The central air outlet 24 with its series of openings 25 is provided sothat fresh oxygen may be fed above the fire bed to cause more nearlycomplete combustion of the coal gases thereover. The particular innerconstruction of boiler described with the inner inclined wall 12 of thefire pot and the combustion chambers 15 and the communicationstherebetween provide an increase in the length of travel for the gasesthrough the furnace which adds to the eiiiciency of the device.

I claim:

1. In a furnace, a lower grate structure, a heat-absorbing wall, anupwardly extending fire pot within the furnace spaced from saidheat-absorbing wall and formed with means of communication between theinterior of said iire pot and the space between said re pot and wall andradial, vertically arranged flanges extending from said fire pot to saidheat-absorbing wall to provide a plurality of separate combustionchambers between said ire pot and said wall.

2. In a furnace, a lower grate structure, a heat-absorbing wall, aninner upwardly extending apertured wall within the furnace adjacent saidheat-absorbing wall forming a lire box within said furnace and radialanges extending from said inner wall to said heatabsorbing wall toprovide individual combustion chai'nbers between said fire box and saidheat-absorbing wall, said iianges being provided with transverseopenings therein whereby communication may. be had between saidcombustion chambers.

3. In a furnace, a lower grate structure, a heat-absorbing wall, anupwardly extending apertured wall forming a fire pot within said furnacespaced from said heat-absorbing wall. a hollow air distributor withinsaid upwardly extending firepot, said distributor being perforatedthroughout substantially its entire length and a hollow diamond-shapedhead on said air distributor extended outward ly therefrom to a positionnear said apertured wall.

(l. In a furnace, a lower grate structure, a iire pot within saidfurnace, a hollow air distributor mounted within said fire pot, a hollowenlarged head on said air distributor extending outwardly toward thewalls of said fire pot to a point substantially midway between the wallsof said air distributor and the walls constituting said lire pot, and apipe communicating with said head and providing an outlet from said airdistributor positioned adjacent the upper portion of said iire pot. A

Signed at New York, in the county of New York and State of New York,this 31st day of October, A. D. 1928.

JOSEPH J. RATHGEB, JR.

